对于盛装液化气体气瓶的公称工作压力是指在（）时瓶内气体压力的上限值。
A.临界温度；
B.基准温度；
C.60℃；
D.-40℃。
参考答案：C
根据句意和首字母提示完成单词。
1. Jim likes playing basketball, while (而) Mike likes playing v_____.
2. Math is very b_____. I don't like it.
3. —Does he have a bat? —Yes, he o_____ has one.
4. My father has a g_____ sports collection.
5. Do you have a tennis r_____?
室内分布覆盖系统对干放的测试主要是测试哪几项内容（）
A.三阶互调产物
B.信号功率
C.上下行增益
D.隔离度
E.工作频带
